

#    Meaning of awk predefined variables
#    FILENAME    Name of current input file
#    RS  Input record separator character (Default is new line)
#    OFS Output field separator string (Blank is default)
#    ORS Output record separator string (Default is new line)
#    NF  Number of input record
#    NR  Number of fields in input record
#    OFMT    Output format of number
#    FS  Field separator character (Blank & tab is default)
